Number of Op-Amps in Typical Package
Correct Answer: (b) Four
Explanation:
A typical op-amp package usually contains four (4) independent op-amplifiers. The most common example is the LM324 or LM348 quad op-amp IC, which contains 4 complete operational amplifiers in a single 14-pin DIP (Dual In-line Package).
Common Op-Amp Package Configurations:
Single Op-Amp (1): 741 (8-pin DIP)
Dual Op-Amp (2): LM358, 1458 (8-pin DIP)
Quad Op-Amp (4): LM324, LM348 (14-pin DIP) - Most typical
Single Op-Amp with Additional Features (1): TL071, TL081
Why Four Is Typical:
The quad op-amp (4 op-amps per package) is the most commercially available standard configuration. This offers good balance between:
- Flexibility for multi-stage applications
- Compact chip size
- Cost efficiency
- Common usage in analog circuit design
Pinout of Quad Op-Amp (14-pin DIP):
Each op-amp has:
- Non-inverting input
- Inverting input
- Output
- Power supply connections (shared among all 4)
Total pins: 14 (includes +Vs, -Vs, and GND)
Applications:
- Multi-channel amplification
- Complex analog signal processing
- Instrumentation systems
- Audio processing circuits
- Filtering and equalization networks
Conclusion:
A typical op-amp IC package contains four (4) operational amplifiers, making the quad op-amp the standard configuration in the industry.